What routine maintenance is required for the Big Blue 500?

Routine maintenance includes: servicing the air cleaner regularly; checking generator brushes; inspecting and cleaning the spark arrestor muffler; servicing the engine cooling system; and servicing fuel and lubrication systems. Additionally, perform engine prestart checks before each use and adjust engine speed as needed. Always disconnect input power or stop the engine before performing any maintenance work.

From the official Miller Big Blue 500 Welding Generator manual, page 35

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